A migration involves Refreshment when the effect is to replace a media instance with a copy that is sufficiently exact that all Archival Storage hardware and software continues to run as before. The following scenario is an example of Refreshment:
The number of correctable bit errors on a CD-ROM disk has reached a dangerous point and the decision is made to replace it with an exact copy. Once the equivalence between the two has been checked, the new CD-ROM replaces the old CD-ROM and Refreshment has taken place. All AIP components on the CD-ROM are unaltered.
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